Baby formula maker, whose plant was shut down after illnesses, says it's cooperating
                                
                                
                                    (Newser) -
                                    The Justice Department has begun a criminal investigation of actions at Abbott Laboratories' plant in Sturgis, Michigan, that was shut down almost a year ago, intensifying a national shortage of baby formula. The company said it's cooperating with federal investigators,  NBC News  reports. Four infants became ill after having...